The installation was a chore (and I've a savvy technophile) 1 hour hacking the installation files to a USB drive to play music via the USB port of the device (total failure), it took through an SD card to make it work. The player plays back files with each other, no shuffle mode. So I advise you to put your music files in bulk into the SD card to have a minimum of surprise during playback. Aside from that, it works pretty well. For the price, we will not choosy. He plants from time to time, so you have to restart it but it's not so embarrassing. Last blackhead, in areas where there are many radio stations, we are left to switch frequencies regularly because the waves are empty eaten by local radio stations. You end up with a cacophony of sounds and change rapidly driving frequency is not really the top.